Did the GOP want lower oil prices in 2008, or any time during the Bush junta?

None of that is relevant. Trump doesn't care what the GOP wanted during the Bush period. He doesn't care what "the GOP" wants today.

You have this thesis that Trump wants higher oil prices. That he is motivated, in some way, to create higher oil prices. In another thread, you suggested this was because the oil companies donated a lot to his campaign. But Trump wouldn't care about that - there's almost nothing in his history that suggests he's inclined to "pay off" past favors if they don't serve his current interests.

Regardless of whether you think Trump is motivated by traditional political concerns or just rank graft, he has absolutely no reason to seek out higher oil prices. Traditionally, higher oil prices are deeply unpopular with voters and serve as a drag on economic growth. Plenty of past administrations have been willing to have that happen in pursuit of other policy goals (like Bush with the Iraq invasion), but the consequence of higher oil prices is generally negative for their economic policy. And on graft, Trump has virtually no personal economic interests with oil companies - he's mostly on the real estate (and now crypto) side, concentrated on all sorts of transactions in the Middle East (and with Middle East governments), which interests would be harmed by a conflict with Iran and Iraq.

Again, I just don't see any plausible explanation for why this Administration would want oil prices to go up.