I read this post and find the question usefull. I think thinking Gift is the same as thinking attach Serial so speak on attach serial rather to Gift but i think the answer ll be the same .
1)  When we buy a product attach to a attach serial we can see in the "ticket" information relative to product ( product1) like the image  ( product1a image) attach to a product ( product1) . Can we see in ticket for product1 the image2a of a product2 when product2 is an option product of product1 ? See the capture screen here for understand. I think no since for attach serial we need a  attach a serial to a product and product 2 don't have a serial . Does the product2a image of product2  can  be use in ticket of product1 ticket near product1a image ? 
2) I think gift card  generate "ticket" base on category and can be think like a attach serial ? I think we need to create for all categories a product that have the name of categories  like for example :
category
----title  = bapteme de l aire de 20 minutes 
product2
----title  = bapteme de l aire de 20 minutes 
----category  = bapteme de l aire de 20 minutes
product1 
---title= product1
---option = product2
---serial = oui actif
I need to study it before be affirmative and rewrite my question related to the original question gift card .
	
	 
 
Here the look of the ticket  for fly with the one selected option call film
3) attachserial parameters for option product .
@hksteam :
with the context / data ( product 1 product2) shown in the previous captures screens can you give the value for the input field relative to option to be able to view image product2a in the ticket ?
@hksteam
Does 0 is the reference to the the first item of options of product1 => product2 ?
@hksteam :
if i choose for format image , Since my data is already an image , can i define the type of my image ? what is the use of the empty field  under the selected field image ?
which value is accepted : mime =>
 image/png ?  or only extension file 
png ?
@lcoulon I hope i understand what you want achieve and don't write wrong thing !! ?
Regard's