Google says it treats all gTLDs the same.
As for ccTLDs, Google looks at them for the most part as being most relevant to the specific country. There are some exceptions with the ccTLDs where Google allows you to indicate what country your domain is aimed at. Here's a list of the ccTLDs that Google treats as generic:
.ad – Andorra
.as – American Samoa
.bz – Belize
.cc – Cocos (Keeling) Islands
.cd – Democratic Republic of Congo
.co – Colombia
.dj – Djibouti
.fm – Micronesia
.io – British Indian Ocean Territory
.la – Laos
.me – Montenegro
.ms – Micronesia
.nu – Niue
.sc – Seychelles
.sr – Suriname
.su – Soviet Union
.tv – Tuvalu
.tk – Tokelau
.ws – Samoa
These ccTLD extensions seem like they would be more valuable because Google treats them as generic.
