Some items did have, originally, a boost to skills etc. However, since that was originally put in, the devs redecided against that, and hence they were removed from the descriptions.
It is possible that in the future they may be brought back in one form or another, but it won't be as a pure skill boost. In the past I heard that it might just be modifications to relevant equations, meaning that likely they would be a percentage boost.
Thank you for answering. Is there a specific reason bonusses to armor associated to IU is still in effect? Or will they be removed too for the timebeing they are not alligned with the GE?
No item has a bonus. If there is one stated in the description, then that description just hasn't been rewritten yet. As has been stated, the description does not equal rules implementation.