The Bible never mentions a gift called 'Laying on of Hands'. The term is used in a couple of cases. Hands are 'layed on' to pray for healing (either physical/mental or demonic possession) or to commission a minister or missionary to carry out his calling.
With this in mind, I will answer a modified question: How do you know if you have the Gifts of Healing?
If you are a born again Christian, and baptized in the Holy Spirit, God may choose to impart to you that gift. If you experience God working healings through you (be clear that it is never a human that works a miraculous healing), you clearly have that gift. It may or may not be long-term.