Tabs seem to be popping up out of nowhere these days. You have a tabs for Facebook, Call History, Twitter, Documents, eReader, and now there's one for GPS.
XDA Developers Forum member xaoc747 has developed posted a GPS tab designed for Sense 2.5 and the HTC HD2. The tab defines your current position and object motion parameters for calculation between the current and previous points. It will record tracks in a Yandex map format along with an analysis of the tracks (distance, speeds, time, etc.).
In skimming over the discussion on this Sense 2.5 tab, there is no mention of it being compatible with any Windows Phone running Sense 2.5 other than the HD2. The Russian Developer has released a similar tab for the HTC Touch Diamond but there is no mention as to whether or not this tab will function on a Touch Pro 2 running Sense 2.5. There is some discussion that some of the settings menus are not translating from Russian to English as well.
If you're in an adventurous mood, you can find the full discussion on the custom tab as well as the download here. Keep in mind this is a home-grown modification that may or may not have bugs and is essentially in the Beta stages.
Correction: This mod was posted over at XDA by xaoc747. The mod was actually developed by member, MoonNah.