An update on some of the targets which I have recently seen for GTE:

Hold - Blackmont raises Gran Tierra Energy price target to $4.75 from $4.70. (today)

Dundee Securities has a buy recomendation with a target of $ 5.25. (May 22nd)

Macquarie Research has an outperform rating with a target of $ 4.75 (April 14th)

This would give a nice ROE based on the current share price if their targets come true.