If given the chance – yes!
To drink, giraffe first have to splay their forelegs and/or bend their knees, and only then can they lower their necks to reach the surface of the water. However, despite their body mass, water is not a necessity as they can absorb sufficient moisture from their food plants. Even when water is readily available, evidence shows that many giraffe do not drink regularly – sometimes not at all.
Where water is readily available giraffe will often drink, rarely daily, with splayed forelegs and/or bent knees to enable their long neck to reach down to the water.