dose the gs300 have a 7mge engine? it looks like one so im just wondering if its just the supra 7mge motor thanks

No, engine is 2JZ-GE

Best information I could find:
GS300 '92-'04 2JZ-GE ('00- VVTi)
SC300 '92-'04 2JZ-GE ('00- VVTi)
IS300 '98-'02 2JZ-GE ('00- VVTi)
ES250 '89-'91 2VZ-FE
ES300 '92-'93 3VZ-FE
ES300 '94-'02 1MZ-FE

Supra '93-'98 2JZ-G(T)E
Supra '86-'92 7M-G(T)E