He will form an important part of the Titans' development in 2017, as they look to build the club around him, Jarryd Hayne and young halves Ash Taylor and Kane Elgey.
Gold Coast begin their pre-season games at the Auckland Nines on February 4 and 5, before taking on the Warriors in Auckland a fortnight later, ahead of their round-one home clash with the Sydney Roosters.
Henry said it was too early to say how much of the pre-season Proctor would miss.
"The knee brace is precautionary," Henry said.
"At the moment, he's got a bit of a knee problem so we will wait for that and assess it. He's certainly off his legs at the moment until we get a look at him."