@rubixsolver34 Sounds like Opera on Linux, so I'll mention what works there.
In the Linux OS, if you've selected Start with Speed dial then Opera never remembers the previous window size and position. If instead you use a saved session or "Continue from last time" as your startup preference, then Opera does remember its size and poeition. So if you really want to start with Speed dial (or in this case, GX Corner) you should save that as a session after sizing and positioning it as desired.
Of coutse, if you were alredy using a saved session or Continue from last time then just ignore this post as I have no idea.