Is Skill Focus: Speak Language even a thing? Back before I gave myself extra INT to give myself all the languages I'd need, I went hunting for a feat that would give me a language (and was going to take a fault to pay for it), but came up unsuccessful. Of course I was mostly skimming and I'd rather just be smarter to begin with, but now I'm curious.
Anyhoo, I think the whole age progression thing is kinda stupid. If D&D is meant to be a roleplaying game, then it seems logical that someone might want to roleplay a tough old badass warrior without worrying about his STR and DEX being lower than the resident squishy mage who happens to be a couple of decades younger. I'd rather do away with it entirely, considering this is a setting where disease and injury aren't quite the threats they would have been in real life around the same technology level thanks to the abundance of healing magic. Plus, if my understanding is correct, many characters in a long-running campaign where age becomes a factor become essentially immortal as they rise in level and find amazing magical items anyway.
Look, to avoid issues I'll drop Darwyn's age to 33. Still among, if not the oldest, still old enough to be considered an uncle, and no more worrying and fussing about this age thing that, again, I'd sooner houserule away.
If age is really going to matter, then Gig will have to significantly age-up his gnome. According to the chart Rolep linked earlier gnomes reach adulthood when they turn 40. We've got the equivalent of an older toddler running around with us.