You are certainly welcome, thank you for the kind words.
There are two products that I would strongly recommend for these repairs
3M 4000 and 3M 5200
Both are marine adhesives and you can find them at any decent marine supplier or on line. The 4000 has half the strength of 5200 in case you might have to separate the parts in the future and it is a fast cure product, 5200 is slow cure (48 hours) but forget taking things apart. They fix broken hulls with this stuff and it's happy underwater.
I used 5200 on my delaminated slideout walls. I had more problems than that. There were cracks in the fiberglass on the roof corners and along the seam near the bottom of the slideout, also water got in rotting the wood frame. I used a 4 1/2" grinder with a cut off wheel to slice the fiberglass open and to enlarge the cracks. Then I used a Dremel tool (like a dentist) to get rid of the wood root. By lifting the fiberglass sheet and peeking into the wall I was able to see where the wood frame was and I marked those locations on the outside.
Aoutozone sells all kinds of polyester resins for fiberglass repair. For maximum bonding you should use fiberglass fabric to span the pieces and then saturate it with pure polyester two part epoxy. They also sell polyester resin with heavy fiberglass in it and another with fine pieces of fiberglass in it. I used both of these pastes to fill in the "cavities" of the rotted wood, fiberglass fabric to knit the cracks and finally just pure epoxy for final finish and sanding. Before that however I laid in between beads of 5200 where I wanted the sidewall to stick back down then I screwed the wall from the outside into the studs marked out to hold it in place while everything cured. Once everything cured the "temporary screws" came out and I epoxied the holes left by the screws, minor thing compared to the rest of the job.
By the way, places like Bliss Marine also sells gelcoat and gelcoat pigments. If you have a good eye for colors you can make yourself a perfectly matched gelcoat to go over your finished and sanded repair.