2 updated answer with recent information
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It is no longer possible to transfer characters in GTA V.

As of March 6th, 2017 character transfers have been discontinuedcharacter transfers have been discontinued.

A Rockstar article also states:

NoteQuestion: Character transfers for GTA Online will be discontinued as of March 6Can I transfer my character from my current platform to another?

Answer: No, 2017. Please see this article for more information: https://support.rockstargames.com/hc/en-us/articles/115002343808is not possible. There is currently no feature available to transfer character data between platforms.

There are no legal ways to transfer a character in GTA V anymore. Since the data for characters is online based, you'd be hard pressed trying to transfer a character by different means, if it's even possible. Support also states that if you attempt to transfer a character, nothing will happen.

It is no longer possible to transfer characters in GTA V.

As of March 6th, 2017 character transfers have been discontinued:

Note: Character transfers for GTA Online will be discontinued as of March 6, 2017. Please see this article for more information: https://support.rockstargames.com/hc/en-us/articles/115002343808

There are no legal ways to transfer a character in GTA V anymore. Since the data for characters is online based, you'd be hard pressed trying to transfer a character by different means, if it's even possible. Support also states that if you attempt to transfer a character, nothing will happen.

It is no longer possible to transfer characters in GTA V.

As of March 6th, 2017 character transfers have been discontinued.

A Rockstar article also states:

Question: Can I transfer my character from my current platform to another?

Answer: No, this is not possible. There is currently no feature available to transfer character data between platforms.

There are no legal ways to transfer a character in GTA V anymore. Since the data for characters is online based, you'd be hard pressed trying to transfer a character by different means, if it's even possible. Support also states that if you attempt to transfer a character, nothing will happen.

1
source | link

It is no longer possible to transfer characters in GTA V.

As of March 6th, 2017 character transfers have been discontinued:

Note: Character transfers for GTA Online will be discontinued as of March 6, 2017. Please see this article for more information: https://support.rockstargames.com/hc/en-us/articles/115002343808

There are no legal ways to transfer a character in GTA V anymore. Since the data for characters is online based, you'd be hard pressed trying to transfer a character by different means, if it's even possible. Support also states that if you attempt to transfer a character, nothing will happen.