As stated above, GoG and FoP are both paid individual attraction selections or individual lightning lanes ($ILL). They are separate from the G+
lightning lane selections. If you are a resort guest, you can book both at 7am. If you are not a resort guest, you have to wait until park opening to book them. They do book fast. FoP has a small chance at being available at 8:00am, but it may only be for later times which will be a problem if you plan to park hop to Epcot. GoG does sometimes have availability at park opening. Since you are looking for a later time for GoG, this may be an advantage.
If you go on the Thrill Data website for each park, it shows you the lightning lane availability for each ride each day. You'll see what time the lightning lanes, and in your case $ILLs, run out and the return time availability.
For example, for today 1/15, FoP sold out at 8:05am. At 8:00am, you could get a 4:55pm $ILL. GoG sold out at 9am. At 8:30 am, you could get a 4:40pm $ILL.
For a general course on G+, I highly suggest you watch the YouTube channel EarScouts. He has the best G+ tutorial videos out there and he goes over $ILL as well.