1911 = 1pOB copy of Curtiss with trailing-edge ailerons and monoplane front elevator.
Graflite SEE Lundy-Kotula
Baby 1911 = 1pOB. Claude Grahame-White. POP: 3. Contract manufacture of 1911 Burgess.
1933 = 1pOmwM; 85hp DH Gypsy. No other data on this racer , which was also registered in 1935 as Huggins, but as a 1pCM.
Mono 192? = Unknown type with Genet motor. [944M].
Bee Gee Baby 1948 = 1p CmwM; 85hp Continental C-85. Midget racer Old Needle-Nose [N1303V]; destroyed in testing 1948.
Granville Brothers SEE Gee Bee
BT-1 1928 = 4pOB; 150 Hisso I; span: 37'0" length: 18'6". POP: 1  c/n 1. Also seen as  c/n 1, which was "a temporary ID issued erroneously," according to a NASM abstract, and which was cancelled in 1929 and replaced by the lower number.
Gray Special [N724DG] (William T Larkins]
This address appears in certain records, and is likely connected with the following Gray Goose, but no satisfying trail can be established, so we treat it as a separate entity until otherwise educated. And yet another recently found Gray Goose is now roosting at Willoughby.
Cyclogyro  (magazine clip)
XB-1 1928 = 7pCM; 420hp Lincoln-Liberty 12; span: 50'0" length: 32'0"; ff: 5/25/28(?). . Crashed at Pico Rivera (CA) on 7/7/28, killing pilot and company vice-pres Howard Blanchard and a passenger. There is a distinct possibility that Blanchard was screenwriter for the aviation film, "The Lone Eagle" (1927), then his writing career ended abruptly there.
AT-19 1979 = 2pClwM; 180hp Lycoming O-360-A1A;span: 24'4" length: 21'0" load: 715# v: 218/198/58 range: 600; ff: 5/24/79 [N23GA]. Side-by-side cockpit, V-tail, tailwheel.
1901 = 1pOB; span: 40'0". Little information on this craft either built by Green, then treasurer of US Aeronautic Society, other than it had three propstwo tractors and one pusher. Obviously unsuccessful at flight or we would have heard about it.
1929 = No info found on this intriguing sounding creation, if there was such..
Greenleaf SEE Player
Burco Sport 1934 = 2pOM; 65hp Velie.  c/n 101.
Bicraft 1935 = 2pClwM rg; two 50hp Menasco M-50. All-wood geodetic basket-weave construction, evolved from Yates Oregon O; tandem seating. Originally had 40hp Continental A-40. POP: 1 , with a few more reportedly built by other individuals. Greenwood is reported in some references as later (c.1940) appearing with Player (qv), another basket-weaver; however there could very well be a journalistic mixup of his name, and presence, with that of Player's president in 1940, John Greenleaf. To furrow more brows, Fall 1962 AAHS Journal tells of a W I Greenleaf, who "backed Mr Stroop [ed: inventor of an 'Arcuate Control System' in 1932] and was one of the first executives in the country to use an airplane in his business travels." An attendant photo shows Mr Greenleaf standing behind a lanky teenager, who might be little John.
GN-1 Aircamper 1965 = 2pOhwM; 65hp Continental A-65-8; span: 29'0" length: 18'1" v: 115/90/35 range: 400; ff: 11/x/65. Modernized version of Pietenpol Aircamper. Piper J-3 cut-down wings, struts, and landing gear. Engine options up to 85hp.
A-75 1936 = 2pClwM; 75hp Continental C-75; span: 35'11" length: 22'6" v: 116/x/x range: 440. Emigh Rocket repowered and renamed; aka Emigh-Gregg. POP: 1 [NX21963].
Gregor FDB-1 [CF-BMB]
Gregor GR-1 [X864Y] (V J Berinati coll)
Lionheart 199? = 4pCB rg; 450hp P&W R-985; span: 31"0" length: 27'0" load: 1900# v: 230/200/56 range: 1500 ceiling: 20,000'. Negative-staggered wings a la Beechcraft 17. Composite material construction. Flaps all wings. Kits marketed to home-builders for $86,900. POP: 2.
Grinnell-Robinson Biplane (Bill Owen coll via Ralph Cooper)
Grinnell-Robinson Scout (Bill Owen coll via Ralph Cooper)
Groen Brothers, G B A
Hawk I 1992 = 1pCAg prototype built to evaluate the rotor system; ff: 9/26/92 [N4379X].
Hawk II 199? = 2CAg; 220hp Lycoming IO-360 pusher; rotor: 34'0" length: (fuselage) 16'8" load: 800# v: 160/140/x range: 560.
Groen Hawk 4 Oshkosh 2000(?) (unknown source, sent as email)
Hawk V 199? = 5pCAg; 565hp; load: 1400# v: 160/x/x.
Jet Hawk 4T 2000 = Jet version of Hawk IV with 420hp Rolls-Royce 250 gas turbine; ff: 7/12/2000. World's first jet-powered gyroplane.
200 1929 = 2pOhwM; 60hp LeBlond 5D; span: 30'0" length: 18'0" load: 453# v: 112/85/33 range: 470. Full-cantilever wing. $1,800. Plans offered for $5, and kits from $275-325 for a slightly detuned version to accept 25-35hp motors (span: 30'0" length: 20'0" v: 85/x/32).
Guey SEE Yue
112, 114 SEE Rockwell.
AA-1C 1977 (TC A11EA, A17EA) = 2pClwM trainer and utility evolution of Grumman American AA-1. 115hp Lycoming O-235C2C. POP: 211. Later renamed T-Cat and Deluxe Lynx.
Gulfstream-American AA-5A [N27150] (Eric Paslick)
AA-5B, Tiger 1975 (TC A16EA) = 180hp Lycoming O-320-A4K. Tiger was deluxe version.Ag-Cat 19?? = Continued production of Grumman Ag-Cat. Production actually done by Schweizer, who eventually acquired the design rights.
C-20 SEE Gulfstream III/ IV.
GA-7, Cougar 1978 = Evolution of Grumman American AA line. 4pClwM rg; two 160hp Lycoming O-320-D1D; span: 36'9" length: 29'7" (?>29'10") load: 1285# v: 193/131/62 range: 1336 ceiling: 18,300'. POP: 115.
GAC-159-C Gulfstream I Commuter 1979 = 10'8" stretch of existing Grumman Gulfstream I for commuter airline operation.
Grumman G-1159 [N701G] (Roger Seybel coll via Andrew Seybel)
Gulfstream IIB 1981 = Rewinging of existing II with wing of Gulfstream III. POP: 40.Gulfstream C-20A (Gulfstream)
Gulfstream III 1979 = Redesign of Gulfstream II with fuselage stretched 2'0", new windshield and radome, modified inboard wing and addtiion of winglets; span: 77'10" length: 83'2" v: 576 range: 4715. Designed in collabration with Grumman. C-20A/-20B was used by USAF for VIP transport, with differences only in electronics; unit cost: $22.2 million.
Gulfstream IV [N9500M] (Eddie Coates coll)
Gulfstream V [N111LX] (Eddie Coates coll)
Hustler 500 1978 = No data; ff (as AJI Hustler 500): 1/11/78.
Gulfstream Peregrine 600 Prototype [N600GA] (AJI)
SRA-1, -4 1984 = USAF. Special-mission version of Gulfstream III/IV.
Tr.2 = Dual-control version of AA-1C.
Model 1 1939 = 1pOM; 32hp Ford. POP: 1 [N18266].
H-429 1930 = 3pCM; 180hp Wright-Hisso E. Modified to 2p in Sep 1932. [X10708] c/n 6; reg cancelled 1/15/34.
Monoplane 1928 = 4pOhwM; 150hp Hisso A; span: 42'0" length: 25'6". Described as "similar to Ryan" with lift-struts. POP: 1  c/n 3; reg cancelled 3/14/30. Dismantled, reported to CAA in Feb 1930: "The welding was rather poor, was not licensed, and of no use."
G W H
Special 1932 = 1pOhwM and 2pOBF. Began life as a Heath Parasol land monoplane with a 32hp Johnson outboard engine. Sold c.1933 to Victor Lindahl, of Seattle, who rebuilt it as a long-wing biplane on floats and with a 40hp Ford T motor. [899N].
Gwinn Aircar Original tail and cowl [X1271] (Frank Rezich coll)
1936 = 1pOH, human-powered; rotor: 14'0". Dr W Frederick Gerhardt, head of the Aeronautical Engineering Dept. No more than a basic framework with part of a bicycle suspended beneath a two-bladed rotor, this was the first heavier-than-air machine to attain flight, albeit only in inches, with human pedal-power supplied by Olympic fencer Johanna de Tuscon.
Gyrodyne GCA-2 [N74101]
Gyrodyne GCA-2A [NX74101] (1000aircraftphotos.com)
GCA-2C 1952 = 6-8pCH; 450hp P&W R-985; rotor: 48'0" v: 87/70/0 ff: 4/25/52 (p: Jim Ryan). Coaxial, twin-blade rotor; tail rotor replaced by two traditional rudders; quad gear [N6594K]. Convertible to an ambulance with three litters. Company subsequently went into convertaplane designs as Helidyne.
GCA-5 Gyrodyne - A 1951 project of a 3p single-engine, single-rotor helicopter with a tail rotor that swiveled laterally to serve as a pusher prop. No known production.
GCA-7 Helidyne - Proposed version that was to have a wing, as well as two O-200 pushers, apparently was never built. Gyrodyne went on to produce their later drone helicopters for Dept of Defense.
GCA-59 Rotorcycle, HOG, RON c.1955 = 1pOH; 40hp Nelson H-59, later 4-cyl 62hp Porsche; rotor: 17'0" (?>20'0") length: 11'0" load: 280# v: 71/60/0 range 31. Gross wt: 700#. Conceived as a simple, portable, one-man helicopter for liaison, observation, and small-unit tactical maneuvers. POP: 3 to USMC initially as XHOG-1, then as XRON-1 and YRON-1 [4013, et al].
1928 = A wedding of the Cierva autogyro design with that of a helicopter would, ideally, produce a best-of-both-worlds machine, but what came of this grand plan is unknown. Charles W Lay. POP: 1 small prototype with 50hp Anzani  c/n A-1, and 1 larger version with 200hp Hisso  c/n A-2, possibly others.