Yes it definitely can help. Since it is from a long time it will eventually be relieved if you start working on strengthening your quadriceps muscle. For that you can do half squattings ( start with 7 repetitions). Also you can use hinge braces for support if you feel that the gap is extremely huge.
Next Steps
You can start with quadriceps strengthening while sitting on a chair or bed. You can perform isometric exercise by pressing your knee downwards on bed in a sitting position with legs straight (hold for 5 seconds with 10 repetitions). It will really help in reducing gap between the knees. Strenthening a muscle is not easy it takes time so you can gradually increase the repetitions after a week or two. After a week do check for progress so that the exercise protocol can be progressed
Health Tips
Do not perform full squats as it will furthermore increase the gap between the knees