As long as those trees have different people on them , then yes. Best to keep them small or the GEDcompare will take a while to do.
The WHOLE point of Wikitree is to make ONE large global tree so every person gets ONE profile!!
If your trees all have the same people on them, then there will be problems because you will be rejecting those who already have profiles on wikitree.
Every person on every gedcom must be compared with every other person on wikitree to see if there is already a match or not. The software does this automatically, but the more people you have on your tree, the long the whole process takes. This is why we suggest SMALL GEDCOMS.