George R. R. Martin blev frågad detta och förklarade att han förnekade Tyrion gäst rätt.
Another subject was guest rights. He mentioned the time the Tyrion came to Winterfell and Robb met him with bare steel across his lap. That meant that there was no guest rights for Tyrion.
So Spake Martin, ARCHON MEETING (OCTOBER 5-7)
Gäster till höger i de sju kungadömena följer inte riktigt för mycket nuförtiden utom i norra och den sanna norra delen. Det står att ingen skada ska komma till gästen.
One notable custom that the Northmen hold dearer than any other is guest right, the tradition of hospitality by which a man may offer no harm to a guest beneath his roof, nor a guest to his host. The Andals held to something like it as well, but it looms less large in southron minds. In his text Justice and Injustice in the North: Judgments of Three Stark Lords, Maester Egbert notes that crimes in the North in which guest right was violated were rare but were invariably treated as harshly as the direst of treasons. Only kinslaying is deemed as sinful as the violations of these laws of hospitality.
The World of Ice and Fire, The North
Så även om han inte talar om Tyrion, kan han inte stanna på Winterfell, han säger att han inte kommer att skyddas under hans vistelse där.