I cannot get GSplus to display in the orginal aspect ratio in full screen - it only displays in widescreen

[Deckard75]

Basically the title. I would love to be able to run this emulator in full screen mode in its original aspect ratio so it resembles the real Apple IIgs. Right now when I go to full screen the emulator will only display in widescreen. I would like to use this emulator as it was as close to the IIgs as possible.