"Happy to train with the team again. It felt really good!" Pique said on his official Twitter account on Monday.
The Spain international has been out of action with a foot injury since Barca's 3-2 win over Spartak Moscow seven weeks ago and his replacements have struggled at times.
He was named in Tito Vilanova's squad for the clash at the Scottish champions but Adriano Correia and Carles Puyol are out injured, while Sergio Busquets is suspended.
Group leaders Barca are five points above second-placed Celtic after three wins out of three and are close to securing qualification to the last 16.
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- Tito Vilanova
- Sergio Busquets