gtkspell is outdated. Is there any reason why this ebuild hasn't been upgraded to 2.0.4? I know 2.0.3 had some problems with detecting aspell but this is fixed in 2.0.4.
hmm maybe because it's hard to keep track of every package out there, but thats where your notification comes in ;) Anyway, i actually knew it was out just didn't get around to adding it. 2.0.4 is in ~ now.