Why i can't sent the gift to another country

"Due to regional price differences, the gift you are trying to send cannot be sent to the recipient's region."

Steam forbids sending gifts if the price difference is more than 10%.
You can buy a key (be careful, some keys may also be limited by activation region) or ask the winner to give their consent to delete giveaway. Then create a ticket in support.

It's not to a different country per se, just one with a regional pricing difference too high. Due to some silly laws in Europe (IIRC), Steam cannot simply say "hey, the price we listed applies only to your region, but if you want to gift to someone in X, you'll have to pay Y". It might be partially also a holdover from the days where you could buy games for your inventory, though that could be easily worked around.

Use SteamDB next time to select regions for your giveaway next time you plan on doing a direct gift rather than a key.

Oooh....
I see...
Thank you for explain to me!

I understand, that's a great way to handle with this situation.
I live in Brazil, here the games are expensive, but not to much, so sometimes i can buy some games.
If they used the dolar price, it would be impossible to buy.
The dolar is 5x more than your money
->i`m sorry for my english and thank you guys

So the particular message you got was from Steam preventing you sending a gift. As others have said, it's because Steam no longer allows you to gift to a region where the price is more than 10% equivalent to what you pay. In addition to this, there have been reports that Steam may eventually block you from gifting entirely if they decide you are a trader (i.e. if you continually add new 'friends' and gift to them).

For these reasons, most prefer to give away using keys bought from other (preferably reputable) sites. You can find these on ITAD or ggdeals. You still have to deal with region restrictions though - obviously you can just restrict to your own region, at least until you get more confidence - or if you buy a bundle look out for posts in deals as they nearly always list restrictions.

As with most things, the root trouble is capitalism.

I just know that i don't know what do do now... i created a ticket, but i'm really sad because i couldn't sent the gift...

The problem is that i just have money on my steam wallet =/
I gave to he gems, and we created a ticket here...
i hope that this works...
P.s. thanks! I like the creator a lot, she makes beautiful draws!

Look up the game at https://steamdb.info/app/323190/
and you can see the price differences.